1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/autocomplete/history_url_provider.h"
6
7 #include <string>
8
9 #include "base/string_util.h"
10 #include "base/utf_string_conversions.h"
11 #include "chrome/browser/autocomplete/autocomplete.h"
12 #include "chrome/browser/autocomplete/autocomplete_match.h"
13 #include "chrome/browser/history/history.h"
14 #include "chrome/browser/net/url_fixer_upper.h"
15 #include "chrome/browser/profiles/profile.h"
16 #include "chrome/common/url_constants.h"
17 #include "googleurl/src/url_util.h"
18
HistoryProvider(ACProviderListener * listener,Profile * profile,const char * name)19 HistoryProvider::HistoryProvider(ACProviderListener* listener,
20 Profile* profile,
21 const char* name)
22 : AutocompleteProvider(listener, profile, name) {
23 }
24
DeleteMatch(const AutocompleteMatch & match)25 void HistoryProvider::DeleteMatch(const AutocompleteMatch& match) {
26 DCHECK(done_);
27 DCHECK(profile_);
28 DCHECK(match.deletable);
29
30 HistoryService* const history_service =
31 profile_->GetHistoryService(Profile::EXPLICIT_ACCESS);
32
33 // Delete the match from the history DB.
34 GURL selected_url(match.destination_url);
35 if (!history_service || !selected_url.is_valid()) {
36 NOTREACHED() << "Can't delete requested URL";
37 return;
38 }
39 history_service->DeleteURL(selected_url);
40
41 // Delete the match from the current set of matches.
42 bool found = false;
43 for (ACMatches::iterator i(matches_.begin()); i != matches_.end(); ++i) {
44 if (i->destination_url == selected_url && i->type == match.type) {
45 found = true;
46 if (i->is_history_what_you_typed_match || i->starred) {
47 // We can't get rid of What-You-Typed or Bookmarked matches,
48 // but we can make them look like they have no backing data.
49 i->deletable = false;
50 i->description.clear();
51 i->description_class.clear();
52 } else {
53 matches_.erase(i);
54 }
55 break;
56 }
57 }
58 DCHECK(found) << "Asked to delete a URL that isn't in our set of matches";
59 listener_->OnProviderUpdate(true);
60 }
61
62 // static
FixupUserInput(const AutocompleteInput & input)63 string16 HistoryProvider::FixupUserInput(const AutocompleteInput& input) {
64 const string16& input_text = input.text();
65 // Fixup and canonicalize user input.
66 const GURL canonical_gurl(URLFixerUpper::FixupURL(UTF16ToUTF8(input_text),
67 std::string()));
68 std::string canonical_gurl_str(canonical_gurl.possibly_invalid_spec());
69 if (canonical_gurl_str.empty()) {
70 // This probably won't happen, but there are no guarantees.
71 return input_text;
72 }
73
74 // If the user types a number, GURL will convert it to a dotted quad.
75 // However, if the parser did not mark this as a URL, then the user probably
76 // didn't intend this interpretation. Since this can break history matching
77 // for hostname beginning with numbers (e.g. input of "17173" will be matched
78 // against "0.0.67.21" instead of the original "17173", failing to find
79 // "17173.com"), swap the original hostname in for the fixed-up one.
80 if ((input.type() != AutocompleteInput::URL) &&
81 canonical_gurl.HostIsIPAddress()) {
82 std::string original_hostname =
83 UTF16ToUTF8(input_text.substr(input.parts().host.begin,
84 input.parts().host.len));
85 const url_parse::Parsed& parts =
86 canonical_gurl.parsed_for_possibly_invalid_spec();
87 // parts.host must not be empty when HostIsIPAddress() is true.
88 DCHECK(parts.host.is_nonempty());
89 canonical_gurl_str.replace(parts.host.begin, parts.host.len,
90 original_hostname);
91 }
92 string16 output = UTF8ToUTF16(canonical_gurl_str);
93 // Don't prepend a scheme when the user didn't have one. Since the fixer
94 // upper only prepends the "http" scheme, that's all we need to check for.
95 if (canonical_gurl.SchemeIs(chrome::kHttpScheme) &&
96 !url_util::FindAndCompareScheme(UTF16ToUTF8(input_text),
97 chrome::kHttpScheme, NULL))
98 TrimHttpPrefix(&output);
99
100 // Make the number of trailing slashes on the output exactly match the input.
101 // Examples of why not doing this would matter:
102 // * The user types "a" and has this fixed up to "a/". Now no other sites
103 // beginning with "a" will match.
104 // * The user types "file:" and has this fixed up to "file://". Now inline
105 // autocomplete will append too few slashes, resulting in e.g. "file:/b..."
106 // instead of "file:///b..."
107 // * The user types "http:/" and has this fixed up to "http:". Now inline
108 // autocomplete will append too many slashes, resulting in e.g.
109 // "http:///c..." instead of "http://c...".
110 // NOTE: We do this after calling TrimHttpPrefix() since that can strip
111 // trailing slashes (if the scheme is the only thing in the input). It's not
112 // clear that the result of fixup really matters in this case, but there's no
113 // harm in making sure.
114 const size_t last_input_nonslash =
115 input_text.find_last_not_of(ASCIIToUTF16("/\\"));
116 const size_t num_input_slashes = (last_input_nonslash == string16::npos) ?
117 input_text.length() : (input_text.length() - 1 - last_input_nonslash);
118 const size_t last_output_nonslash =
119 output.find_last_not_of(ASCIIToUTF16("/\\"));
120 const size_t num_output_slashes =
121 (last_output_nonslash == string16::npos) ?
122 output.length() : (output.length() - 1 - last_output_nonslash);
123 if (num_output_slashes < num_input_slashes)
124 output.append(num_input_slashes - num_output_slashes, '/');
125 else if (num_output_slashes > num_input_slashes)
126 output.erase(output.length() - num_output_slashes + num_input_slashes);
127
128 return output;
129 }
130
131 // static
TrimHttpPrefix(string16 * url)132 size_t HistoryProvider::TrimHttpPrefix(string16* url) {
133 // Find any "http:".
134 if (!HasHTTPScheme(*url))
135 return 0;
136 size_t scheme_pos =
137 url->find(ASCIIToUTF16(chrome::kHttpScheme) + char16(':'));
138 DCHECK_NE(string16::npos, scheme_pos);
139
140 // Erase scheme plus up to two slashes.
141 size_t prefix_end = scheme_pos + strlen(chrome::kHttpScheme) + 1;
142 const size_t after_slashes = std::min(url->length(), prefix_end + 2);
143 while ((prefix_end < after_slashes) && ((*url)[prefix_end] == '/'))
144 ++prefix_end;
145 url->erase(scheme_pos, prefix_end - scheme_pos);
146 return (scheme_pos == 0) ? prefix_end : 0;
147 }
148